Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2003TRAILBLAZER 4.2 S, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 805 (ANTILOCK BRAKE SYSTEM WITH TCVS & VSES)
2003 Chevrolet TrailBlazer 4.2 S, 4WD
Section 805 (Antilock Brake System With TCVS & VSES)
2003 Chevrolet TrailBlazer 4.2 S, 4WDSECTION Section 805 (Antilock Brake System With TCVS & VSES)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Antilock Brake System
- Diagnostic System Check - ABS (W/O JL4)
- Diagnostic System Check - ABS (W/JL4)
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC C0035 or C0040: Front Wheel Speed Circuit Malfunction
- DTC C0045 or C0050: Rear Wheel Speed Circuit Malfunction
- DTC C0110: Pump Motor Circuit Malfunction
- DTC C0131: Antilock Brake System (ABS)/Traction Control System (TCS) Pressure Circuit
- DTC C0161: ABS/TCS Brake Switch Circuit Malfunction
- DTC C0186: Lateral Accelerometer Circuit Malfunction
- DTC C0196: Yaw Rate Circuit Malfunction
- DTC C0201: Antilock Brake System (ABS) Enable Relay Contact Circuit
- DTC C0220: Left Front Antilock Brake System (ABS) Channel in Release Too Long
- DTC C0221 To C0227 (W/O JL4): Wheel Speed Sensor Circuit
- DTC C0221 To C0227 (W/JL4): Right Front Antilock Brake System (ABS) Channel in Release Too Long
- DTC C0228: Left Rear Antilock Brake System (ABS) Channel in Release Too Long
- DTC C0229 (W/O JL4): Simultaneous Drop Out of Front Wheel Speed Signals
- DTC C0229 (W/JL4): Right Rear Antilock Brake System (ABS) Channel in Release Too Long
- DTC C0235 To C0237 or P0609: Rear Wheel Speed Sensor Circuit
- DTC C0238: Rear Wheel Speed Sensor Circuit
- DTC C0240: Powertrain Control Module (PCM) Traction Control Not Allowed
- DTC C0241 To C0243: EBCM Malfunction
- DTC C0244 (W/O JL4): EBCM Malfunction
- DTC C0244 (W/JL4): Pulse Width Modulated (PWM) Delivered Torque
- DTC C0245 (W/JL4): Wheel Speed Sensor Frequency Error
- DTC C0245 (W/O JL4): EBCM Malfunction
- DTC C0246 To C0254: EBCM Malfunction
- DTC C0265 or C0266: EBCM Relay Circuit
- DTC C0267 or C0268: Pump Motor Circuit Open/Shorted
- DTC C0269 or C0274: Excessive Dump/Isolation Time
- DTC C0271 To C0273, C0284: EBCM Malfunction
- DTC C0279 (W/O JL4): Powertrain Configuration Not Valid
- DTC C0279 (W/JL4): Pre-charge Pump Circuit Performance
- DTC C0281: Brake Switch Circuit
- DTC C0283 (W/O JL4): Traction Switch Circuit
- DTC C0283 (W/JL4): VSES Switch Circuit
- DTC C0287, P1644, or P1689: Delivered Torque Circuit
- DTC C0290 or C0292 (W/O JL4): Lost Communications With PCM
- DTC C0290 or C0292 (W/JL4): VSES Combination Sensor Circuits
- DTC C0291: Lost Communications With BCM
- DTC C0297: Powertrain Configuration Data Not Received
- DTC C0298 or P1571: Powertrain Indicated Traction Control Malfunction
- DTC C0455: Front Steering Position Sensor Circuit
- DTC C0472 or C0473: Steering Handwheel Speed Sensor Signal
- DTC C0550: ECU Malfunction - internal write / checksum malfunction
- DTC C0558: Calibration Data Not Programmed
- Symptoms - Antilock Brake System
- ABS Indicator Always On
- ABS Indicator Inoperative
- Stability System Disabled Indicator Always On
- Traction Off Indicator Always On
- Traction Off Indicator Inoperative
- Traction Control System Poor Performance
- Vehicle Stability Enhancement System Poor Performance
- Brake Pressure Modulator Valve Hydraulic Testing
- Repair Instructions
- ABS Automated Bleed Procedure (w/o JL4)
- ABS Automated Bleed Procedure (W/JL4)
- Yaw Rate Reference Table Reset Procedure
- Electronic Brake Control Module (EBCM) Replacement (w/JL4)
- Electronic Brake Control Module (EBCM) Replacement (w/o JL4)
- Brake Pressure Modulator Valve (BPMV) Replacement (w/JL4)
- Brake Pressure Modulator Valve (BPMV) Replacement (w/o JL4)
- Brake Pressure Modulator Valve Pre-Charge Pump Replacement
- Wheel Speed Sensor Replacement - Front (2WD)
- Wheel Speed Sensor Replacement - Front (4WD)
- Wheel Speed Sensor Replacement - Rear
- Wheel Speed Sensor Ring Replacement - Rear
- Traction Control Switch Replacement (Stabilitrak)
- Traction Control Switch Replacement (Traction Control)
- Yaw Rate Sensor/Lateral Accelerometer Replacement
- Description and Operation
- ABS Description and Operation (W/O JL4)
- Notes
- Initialization Sequence
- Antilock Brake System
- Pressure Hold
- Pressure Decrease
- Pressure Increase
- Dynamic Rear Proportioning (DRP)
- Traction Control System (TCS)
- ECE 13 Response
- Brake Warning Indicator
- ABS Indicator
- Traction Control Indicators (w/NW7)
- Programming the Traction Control Automatic Engagement Feature
- ABS Description and Operation (W/JL4)
- Notes
- Antilock Brake System (ABS)
- Pressure Hold
- Pressure Decrease
- Pressure Increase
- Dynamic Rear Proportioning (DRP)
- Traction Control System (TCS)
- Engine torque reduction
- Brake pressure application
- Vehicle Stability Enhancement System (VSES)
- System Pre-Fill
- Precharge Pump
- Power-up Self-Test
- VSES Sensors Initialization
- ECE 13 Response
- Driver Information Indicators and Messages
- Brake Warning Indicator
- ABS Indicator
- Traction Off Indicator
- Service Brake System Message
- Stability System Active Message
- Stability System Disabled Message
- Service Stability System Message
- Traction Active Message
- ABS Description and Operation (W/O JL4)
- Special Tools and Equipment
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.